Somatoform disorders are physical ailments (such as pain, nausea, dizziness) for which no adequate medical explanation has been found and/or are caused by psychological factors.
The complaints are serious enough to cause significant emotional distress and impairment of social and/or occupational functioning

A diagnosis of a somatoform disorder implies that psychological factors are a large contributor to the symptoms onset, severity and duration. It is important to note that somatoform disorders are not the result of conscious malingering or factitious disorders.